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Measurement of two-phase velocities in bubble flows using laser Doppler velocimetry

作     者:Ling-xin Zhang Xin-sheng Cheng Han Tu Qi Gao Xue-ming Shao Xiang-Wei Liao Liang Zhao Ling-xin Zhang;Xin-sheng Cheng;Han Tu;Qi Gao;Xue-ming Shao;Xiang-Wei Liao;Liang Zhao

作者机构:Department of Engineering MechanicsZhejiang UniversityHangzhou310027China Iron and Steel Research Institutes of Ansteel Group CorporationAnshan114009China State Key Laboratory of Metal Material for Marine Equipment and ApplicationAnshan114009China 

出 版 物:《Journal of Hydrodynamics》 (水动力学研究与进展B辑(英文版))

年 卷 期:2022年第34卷第6期

页      面:1134-1144页

核心收录:

学科分类:080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学(可授工学、理学学位)] 

基  金:Project supported by the State Key Program of National Natural Science of China(Grant No.91852204) supported by the Program of State Key Laboratory of Marine Equipment(Grant No.SKLMEA-K201910) 

主  题:laser Doppler velocimetry(LDV) bubbly flow phase discrimination bubble tracking velocimetry(BTV) 

摘      要:The measurement of two-phase velocities in bubble flows using laser Doppler velocimetry(LDV)is *** key to the problem is to differentiate the LDV signals from bubbles and tracers,based on which the two-phase velocities can be *** this study,two experiments are carried ***,the bubble-chain experiment is performed to investigate the optical response of bubble surface and the corresponding LDV *** optical response shows that the light received by the LDV detector is dominated by the reflection component,which is similar to specular reflection to some *** are three typical patterns of signals of large bubbles passing through the measurement volume,all of which are with high amplitude and ***,the upward-flow experiment is conducted to study the statistical characteristics of large bubbles as well as micro tracers and micro *** results show that the amplitude of signal of millimeter bubbles is about an order of magnitude larger than that of tracers or micro *** on this significant difference of the amplitude,we propose a phase discrimination method to distinguish two-phase *** capability of the proposed method is tested in a complex bubble flow,and its reliability is verified by bubble tracking velocimetry(BTV)technology.

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